For large communities, is there a way of getting a complete list of members? The directory search feature (http://www.livejournal.com/directorysearch.bml) limits results to 1000 users. The search fields given, from what I can see, won't allow you to systematically go through all possible users in the community short of doing quite a few searches.
Is there some sort of trick that might work well (even if it's not fully accurate)?
The best method I can think of would be searching for several different age ranges. You would just have to hope that no given age would have more than 1000 users in it in that community.